Steam-generator.



No. 759,744. PATENTED MAY 10, 1904.

P. G. A. PEUGEOT.

STEAM GENERATOR. APPLIUATION FILED OUT. 18, 1902.

3 SHEETS-8HBET 1.

N0 MODEL.

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No. 759,744. PATENTED MAY 10, 1904. P; G. A. PEUGEOT. STEAM GENERATOR.

APPLICATION FILED OCT. 18, 1902.

N0 MODEL.

3 SHEETSSHEBT 2.

III III A W 5r 7% WK I UNITED STATES Patented May 10, 1904.

PATENT OFFICE.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent N 0. 759,744, dated. May 10, 1904.

Application filed October 18, 1902,

To all w/tom, it 711,007 concern? Be it known that I, PIERRE GODEFEOY AR- MAND PEUGEOT, manufacturer, of 83 Boult vard (Jrouvion St. Cyr, in the city of Paris, Hepublic of France, have invented an Improved Steam-Generator, of which the following is a full, clear, and exact description.

This invention relates to an improved boiler for the instantaneous production of so perheated steam, which, as in others of this class, comprises strong tubes which are brought to a high temperature within a non-conducting casing and constitute a tubulous system to which water under pressure is fed at the one end and from which steam is supplied at the other end in a more or less dry or superheated condition.

The characteristic features of the invention consist in the form and arrangement of the tubes, in the mode oi circulation of the fluid, and in the mode of discharging the products of combustion.

- The accompanying drawings show, by way of example, several views of this improved generator.

Figure 1 is an elevation, Fig. 2 an axial section, Fig. 3 a top plan, Fig. 4 a horizon tal section, and Fig. 5 a front elevation, of the generator.

The same letters of reference denote like parts in the several figures.

The generator comprises, first, a coil a, formed of a tube of circular section in the form of a helix undulated in the plane of the spirals, by which a uniform ascensional impulsive mo tion is imparted to the entering fluid; second, a second coil 7), surrounding the former and of similar construction, which terminates in a series of plain spirals c, inclosing the furnacespace, this second group, composed of undulated and ordinary spirals, being designed toproduce a uniform downward flow of the Water.

The furnace, which may be of any kind, may consist of an ordinary grate for burning coal, coke, or other solid fuel or a Bunsen burner for burning gas or oil or a combustible liquid, such as alcohol or hydrocarbons.

The two groups of coils are connected at the upper part at d, and the external coil is made of tube of larger diameter than the inner coil a. The space 6 within the interior of Serial No. 127,820. No model.)

the inner coil ais utilized either for supplying coal or coke to the grate or for the reception of a coil for vaporizing the liquid fuel when the boiler is heated by hydrocarbon-burners. The coils are inclosed in any suitable heat-resisting casing f, consisting, for example, of double walls, inclosing a packing of asbestos, and the top of the boiler is closed by a sheetiron cover 7, protected by asbestos and provided with outlets for the escape of the gases inclosed by hoods h lb. These orifices open into a wind'chute t', which terminates in a downward]y-directed outlet passage or flue In. As the flared end of the wind-chute 71 faces toward the front of the vehicle, the strong draft of air passing therethrough exhausts the gases of combustion and dilutes them before they escape from the outlet k in a large volume of fresh air, thus permitting of the gases being discharged beneath the vehicle in the case of a motor-car without inconvenience from the heat.

During stoppage the gases are allowed to escape at the flared mouth of the wind-chute with a minimum draft in the furnace. The feed-water is injected under pressure at 1 into the lowest and most highly heated part of the inner coil, and the water becoming heated by contact with the tube then passes down through the outer coil, where its vaporization is completed, the steam finally passing through the plain spiral part c of the coil which surrounds the furnace-grate. where it becomes superheated bei'ore passing out at m.

By this construction of generator the conditions required in a boiler of this class are realized in a very simple manner--viz., the admission and exit of the fluid in the vicinity of the most highly heated parts of the generator.

It is to be understood that the external form of the generator may be varied without in any way affecting the combination of elements described and that the invention is also independent of the dimensions and details of arrangement of the several parts of which the boiler is constructed.

I claim- 1. A generator of the class described, comprising a heat-resisting chamber having out lets in one of its walls, aseries of nested coiled,

undulating tubes arranged in said chamber and communication With a regular coil of tubes arranged beneath the undulating tubes, means arranged adjacent to the regular coil of tubes and the undulating tubes for heating the same, an inlet for introducing the liquid in the smallest coil of the series of tubes, an outlet for the vapor generated from said liquid at the largest tube of the series, hoods for the outlets of the generating-chamber, for escape of the products of combustion, and a conductingchute having its open ends mounted above said outlets, the construction being such that the vapors may be carried from the generating-chamber through the conductingtubes to any desired point of discharge, substantially as set forth.

PIERRE GODEFROY ARMANI) PEUGEOT.

Witnesses:

EDWARD P. MAcLEAN, MAURICE H. PIGNET. 

